Evaluate voxel model performance considering Flowers and Grass

[IntegratedQuantum]

I would like to use voxel models for flowers and grass.
The current rendering system uses parallax raymarching for voxel models. This may not work very well for grass and flowers which are mostly air and have lots of detail.

Flowers/Grass would add a full layer of raymarched geometry on the ground.
Additionally the grass/flower models would have lots of details.
So overall parallax raymarching might be too expensive for this.

If this fails other approaches, like billboard textures, need to be considered.